Introduction, W G Runciman Social Evolution in Primates: The Role of Ecological Factors and Male Behaviour, Carel P van Schaik Determinants of Group Size in Primates: A General Model, R I M Dunbar Function and Intention in the Calls of Non-Human Primates, Dorothy L Cheney & Robert M Seyfarth Why Culture is Common, but Cultural Evolution is Rare, Robert Boyd & Peter J Richerson An Evolutionary and Chronological Framework for Human Social Behaviour, Robert A Foley Friendship and the Banker?s (...) Paradox: Other Pathways to the Evolution of Adaptations for Altruism, John Tooby & Leda Cosmides The Early Prehistory of Human Social Behaviour: Issues of Archaeological Inference and Cognitive Evolution, Steven Mithen The Emergence of Biologically Modern Populations in Europe: A Social and Cognitive ?Revolution??, Paul Mellars Responses to Environmental Novelty: Changes in Men?s Marriage Strategies in a Rural Kenyan Community, Monique Borgerhoff Mulder Genetic Language Impairment: Unruly Grammars, M Gopnik, J Dalalakis, S E Fukuda, S Fukuda & E Kehayia The Emergence of Cultures among Wild Chimpanzees, Christophe Boesch Terrestriality, Bipedalism and the Origin of Language, Leslie C Aiello Conclusions, John Maynard Smith. (shrink)

In this carefully argued critique, Steven Horst pronounces the theory deficient.

During human evolutionary history, there were “trade-offs” between expending time and energy on child-rearing and mating, so both men and women evolved conditional mating strategies guided by cues signaling the circumstances. Many short-term matings might be successful for some men; others might try to find and keep a single mate, investing their effort in rearing her offspring. Recent evidence suggests that men with features signaling genetic benefits to offspring should be preferred by women as short-term mates, but there are trade-offs (...) between a mate's genetic fitness and his willingness to help in child-rearing. It is these circumstances and the cues that signal them that underlie the variation in short- and long-term mating strategies between and within the sexes. Key Words: conditional strategies; evolutionary psychology; fluctuating asymmetry; mating; reproductive strategies; sexual selection. (shrink)

How do women's sexual interests change across their ovulatory cycles? This question is one of the most enduring within the human evolutionary behavioral sciences. Yet definitive, agreed-upon answers remain elusive. One empirical pattern appears to be robust: Women experience greater levels of sexual desire and interest when conceptive during their cycles. But this pattern is not straightforward or self-explanatory. We lay out multiple possible, broad explanations for it. Based on selectionist reasoning, we argue that the conditions that give rise to (...) sexual interests during conceptive and non-conceptive phases are likely to differ. Because conceptive and non-conceptive sex have distinct functions, the sexual interests during conceptive and non-conceptive phases are likely to have different strategic ends. We discuss provisional evidence consistent with this perspective. But the exact nature of women's dual sexuality, if it exists, remains unclear. Additional empirical research is needed. But perhaps more crucially, this topic demands additional theory that fruitfully guides and interprets future empirical research. (shrink)

We address two points. First, one must explain how different, rare mutations ultimately lead to common psychopathological conditions. The developmental instability model offers one solution. Second, Keller & Miller perhaps miss the major processes other than variation fueled by rare deleterious mutations that account for interesting genetic variation in psychopathology, particularly when single alleles have non-negligible effects: Red Queen processes.

DNA helicases catalyze the disruption of the hydrogen bonds that hold the two strands of double‐stranded DNA together. This energy‐requiring unwinding reaction results in the formation of the single‐stranded DNA required as a template or reaction intermediate in DNA replication, repair and recombination. A combination of biochemical and genetic studies have been used to probe and define the roles of the multiple DNA helicases found in E. coli. This work and similar efforts in eukaryotic cells, although far from complete, have (...) established that DNA helicases are essential components of the machinery that interacts with the DNA molecule. (shrink)

Media exposure can shape audience perceptions surrounding novel innovations, such as artificial intelligence (AI), and could influence whether they share information about AI with others online. This study examines the indirect association between exposure to AI in the media and information sharing about AI online. We surveyed 567 US citizens aged 18 and older in November 2020, several months after the release of Open AI’s transformative GPT-3 model. Results suggest that AI media exposure was related to online information sharing through (...) psychological proximity to the impacts of AI and positive AI performance expectancy in serial mediation. This positive indirect association became stronger the more an individual perceived society to be changing due to new technology. Results imply that public exposure to AI in the media could significantly impact public understanding of AI, and prompt further information sharing online. (shrink)

In this dissertation I argue that the concept of a moral right is best explicated by means of the concept of morally legitimate coercion. This thesis, which I call the enforceability thesis, says that to have a right is to have a claim such that one would be justified in pursuing a course of action up to and including harm should the claim be dissatisfied. I contend that this thesis, if it is true, explains much about our intuitions concerning moral (...) rights, accounts for the historical importance of rights-talk in the context of events such as revolutions and political reforms, and explains why rights are a necessary part of the moral vocabulary. If rights do not set out conditions under which coercion is morally appropriate, then they do nothing that other moral concepts could not do. ;Drawing on the work of H. L. A. Hart, John Rawls, and others, I argue that the philosophical strength and practical efficacy of rights on the enforceability thesis is best realized when rights are treated as action-guiding principles set within a framework of moral decision making under reflective equilibrium. Using the process of reflective equilibrium as a backdrop, I argue that rights can have sufficient normative force to play an important role in moral and political theory without being either impracticably stringent or subject to so many exceptions that they lose their efficacy. ;With this background in place I next set out and argue for a view of human rights which, because human rights turn out to be best understood as rights to primary goods, I call the theory of primary rights. The account I give of primary rights emphasizes their justificatory place in arguments for coercion, their importance to the moral integrity of the individual, and the practical applicability of the overarching theory of rights developed in this dissertation. (shrink)

Abstract Buddhist egology concurs with the Husserlian claim that the enipirical ego is ?constituted?. The Buddhist ?deconstruction? of the ego will not, however, pace Husserl, permit the pronoun ?I? to refer to a purported extra?linguistic entity. The insights here distilled from the unique mode of self?reference functional within the Vietnamese language secure for us an unmistakable confirmation of the Buddhist thesis and have profound consequences for the philosophical problems surrounding the existence and nature of the self and the existence of (...) other minds. (shrink)

Sexual selection processes have received much attention in recent years, attention reflected in interest in human mate preferences. Among these mate preferences are preferences for physical attractiveness. Preferences in and of themselves, however, do not fully explain the nature of the relationships that individuals attain. A tacit negotiation process underlies relationship formation and maintenance. The notion that preferences for physical attractiveness evolved under parasite-driven “good genes” sexual selection leads to predictions about the nature of trade-offs that individuals make between mates’ (...) physical attractiveness and investment potential. These predictions and relevant data are explored, with a primary emphasis on women’s preferences for men’s qualities. In addition, further implications of trade-offs are examined, most notably (a) the impact of environmental variations on the nature of mating and (b) some effects of trade-offs on infidelity and male attempts to control women. (shrink)

Since the seventeenth century, our understanding of the natural world has been one of phenomena that behave in accordance with natural laws. While other elements of the early modern scientific worldview may be rejected or at least held in question—the metaphor of the world as a great machine, the narrowly mechanist assumption that all physical interactions must be contact interactions, the idea that matter might actually be obeying rules laid down by its Divine Author – the notion of natural law (...) has continued to play a pivotal role in actual scientific practice, in our philosophical interpretations of science, and in their its metaphysical implications. (shrink)

This response reinforces several major themes in our target article: (a) the importance of sex-specific, within-sex variation in mating tactics; (b) the relevance of optimality thinking to understanding that variation; (c) the significance of special design for reconstructing evolutionary history; (d) the replicated findings that women's mating preferences vary across their menstrual cycle in ways revealing special design; and (e) the importance of applying market phenomena to understand the complex dynamics of mating. We also elaborate on three points: (1) Men (...) who have indicators of genetic fitness may provide more direct benefits when female demand for extra-pair and short-term sex is very low; (2) both men and women track ecological cues to make mating decisions; and (3) more research on female orgasm is needed. (shrink)

Geoff Goddu's 2010 paper "Is 'Argument' subject to the process/product ambiguity?" and Paul Simard-Smith and Andrei Moldovan's 2011 paper “Arguments as abstract objects” have revived the dialogue about what might be called the "metaphysics of argument". Both papers are important. Both also seem to me to be open to significant objections. In this paper I will lay out some of these objections and give, in rough outline, the kernel of an alternative approach.

In our target article, we discussed the standards of evidence that could be used to identify adaptations, and argued that building an empirical case that certain features of a trait are best explained by exaptation, spandrel, or constraint requires the consideration, testing, and rejection of adaptationist hypotheses. We are grateful to the 31 commentators for their thoughtful insights. They raised important issues, including the meaning of “exaptation”; whether Gould and Lewontin's critique of adaptationism was primarily epistemological or ontological; the necessity, (...) sufficiency, or utility of design evidence, phylogenetic analyses, homology, and molecular genetics in distinguishing exaptations from adaptations; whether adaptationists accept adaptationist hypotheses too quickly; and the real utility of adaptationism to human behavioral science. We organize our response along the major points of the target article, in some situations defending our original claims and in others modifying them. While debate on these issues will undoubtedly continue, we are cautiously optimistic that the main points of the target article (as modified by our response) will help move the debate in a positive direction. (shrink)

Wood, Kressel, Joshi, and Louie (2014) meta-analyzed studies examining changes in women’s mate preferences as a function of cycle phase, and claimed to find little evidence for shifts, contrary to Gildersleeve, Haselton, and Fales’s (2014a) meta-analysis. This commentary concerns specific speculations Wood et al. made about particular researchers analyzing data multiple ways, capitalizing on chance and thereby inflating the Type I error rate. In so doing, Wood et al. misconstrued a key article explaining the high fertility period, misrepresented studies, and (...) presented no supportive evidence. The corrosive effects of inappropriate research practices on scientific literatures are concerning. So too are unsubstantiated speculations of them. (shrink)

The issue of whether or not there are visual arguments has been an issue in informal logic and argumentation theory at least since 1996. In recent years, books, sections of prominent conferences and special journals issues have been devoted to it, thus significantly raising the profile of the debate. In this paper I will attempt to show how the views of the later Wittgenstein, particularly his views on images and the no- tion of “picturing”, can be brought to bear on (...) the question of whether there are such things as “purely visual” arguments. I shall draw on Wittgenstein’s remarks in the Blue and Brown Books and in Philosophical Investigations in order to argue that al- though visual images may occur as elements of argumentation, broadly conceived, it is a mistake to think that there are purely visual arguments, in the sense of illative moves from premises to conclusions that are conveyed by images alone, without the support or framing of words. (shrink)

In her 2007 paper, “Argument Has No Function” Jean Goodwin takes exception with what she calls the “explicit function claims”, arguing that not only are function-based accounts of argumentation insufficiently motivated, but they fail to ground claims to normativity. In this paper I stake out the beginnings of a functionalist answer to Goodwin.

1 Adaptationism is a research strategy that seeks to identify adaptations and the specific selective forces that drove their evolution in past environments. Since the mid-1970s, paleontologist Stephen J. Gould and geneticist Richard Lewontin have been critical of adaptationism, especially as applied toward understanding human behavior and cognition. Perhaps the most prominent criticism they made was that adaptationist explanations were analogous to Rudyard Kipling's Just So Stories. Since storytelling is an inherent part of science, the criticism refers to the acceptance (...) of stories without sufficient empirical evidence. In particular, Gould, Lewontin, and their colleagues argue that adaptationists often use inappropriate evidentiary standards for identifying adaptations and their functions, and that they often fail to consider alternative hypotheses to adaptation. Playing prominently in both of these criticisms are the concepts of constraint, spandrel, and exaptation. In this article we discuss the standards of evidence that could be used to identify adaptations and when and how they may be appropriately used. Moreover, building an empirical case that certain features of a trait are best explained by exaptation, spandrel, or constraint requires demonstrating that the trait's features cannot be better accounted for by adaptationist hypotheses. Thus, we argue that the testing of alternatives requires the consideration, testing, and systematic rejection of adaptationist hypotheses. Where possible, we illustrate our points with examples taken from human behavior and cognition. Key Words: adaptation; ADHD; brain allometry; constraint; epistemology; evolutionary psychology; exaptation; female orgasm ; optimization; special design; waist-hip ratio. Footnotes1 The authors contributed equally to this paper. Order of authorship was determined alphabetically. Correspondence may be addressed to any of the authors. (shrink)

This sustained and distinctively Buddhist challenge to the ontology of Jean-Paul Sartre's Being and Nothingness resolves the incoherence implicit in the Sartrean conception of nothingness by opening to a Buddhist vision of emptiness. Rooted in the insights of Madhyamika dialectic and an articulated meditative (zen) phenomenology, Nothingness and Emptiness uncovers and examines the assumptions that sustain Sartre's early phenomenological ontology and questions his theoretical elaboration of consciousness as "nothingness." Laycock demonstrates that, in addition to a "relative" nothingness (the for-itself) defined (...) against the positivity and plenitude of the in-itself, Sartre's ontology requires, but also repudiates, a conception of "absolute" nothingness (the Buddhist "emptiness"), and is thus, as it stands, logically unstable, perhaps incoherent. The author is not simply critical; he reveals the junctures at which Sartrean ontology appeals for a Buddhist conception of emptiness and offers the needed supplement. (shrink)

In this paper I begin by examining Fogelin’s account of deep disagreement. My contention is that this account is so deeply flawed as to cast doubt on the possibility that such deep disagreements actually happen. Nevertheless, I contend that the notion of deep disagreement itself is a useful theoretical foil for thinking about argumentation. The second part of this paper makes this case by showing how thinking about deep disagreements from the perspective of rhetoric, Walton-style argumentation theory, computation, and normative (...) pragmatics can all yield insights that are useful no matter what one’s orientation within the study of argument. Thus, I conclude that deep disagreement –even if it were to turn out that there are no real-world occurrences of it to which we can point–is useful for theorists of argumentation. In this wise, deep disagreement poses a theoretical challenge for argumentation theory not unlike that posed by radical skepticism for traditional epistemology. (shrink)